'Simpsons' exclusive: Jon Hamm to guest

Image Credit: Albert L. Ortega/PR Photos; FoxThe Simpsons is serving up a side of Hamm: Mad Men star Jon Hamm will voice a character on an upcoming episode of the animated Fox comedy, exec producer Al Jean tells EW.com. In the episode—titled “Donnie Fatso” and slated to air in December—Hamm plays an FBI supervisor whom Homer reports to when he becomes an undercover informant in prison and infiltrates Fat Tony’s inner circle (which means, yes, Joe Mantegna returns to reprise his mobster role). But don’t expect to see Don in this don-themed episode. “There’s no Mad Men reference,” says Jean. “Jon’s a gruff FBI man. Homer asks if he can pick his undercover name and finally Jon just says, ‘Your name will be Nicky Blue Pants Altosaxophony.’ Homer says, ‘Do I get to keep the name when I’m done with it?’ and Jon says, ‘No, it’s the property of the government.’ He has no patience for Homer.” And how did the recording session go with Hamm, who has also guested on 30 Rock and SNL? “You gave him one note and he immediately did 12 great things with it,” reports Jean. “He was really funny. And handsome. He had it all.”